IEC 61097-4:2012/AMD2:2019

IEC 61097-4 ®
Edition 3.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Global maritime distress and safety system (GMDSS) –
Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC)
equipment – Operational and performance requirements, methods of testing
and required test results
Système mondial de détresse et de sécurité en mer (SMDSM) –
Partie 4: Stations terriennes de navire INMARSAT de type C et matériel
INMARSAT d'appel de groupe amélioré (AGA) – Exigences opérationnelles
et de fonctionnement, méthodes d'essai et résultats exigibles

IEC 61097-4:2012-05/AMD2:2019-06(en-fr)

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IEC 61097-4 ®
Edition 3.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Global maritime distress and safety system (GMDSS) –

Part 4: Inmarsat-C ship earth station and Inmarsat enhanced group call (EGC)

equipment – Operational and performance requirements, methods of testing

and required test results
Système mondial de détresse et de sécurité en mer (SMDSM) –

Partie 4: Stations terriennes de navire INMARSAT de type C et matériel

INMARSAT d'appel de groupe amélioré (AGA) – Exigences opérationnelles

et de fonctionnement, méthodes d'essai et résultats exigibles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 47.020.70 ISBN 978-2-8322-7044-8

– 2 – IEC 61097-4:2012/AMD2:2019
© IEC 2019
FOREWORD
This amendment has been prepared by IEC technical committee 80: Maritime navigation and
radiocommunication equipment and systems.
The text of this amendment is based on the following documents:
FDIS Report on voting
80/926/FDIS 80/929/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
INTRODUCTION to Amendment 2
NOTE This amendment adds a requirement for an interface for alert management and removes the requirement to
produce a printed copy of received safety information providing there is an interface to other navigation display
equipment. This results from amendments to the performance standards for enhanced group call equipment agreed
by the International Maritime Organization in resolution MSC.431(98) in 2017. It can be noted that the technical
provisions for the interface for the transfer of received data to other navigation display equipment were included in
IEC 61097-4:2012/AMD1:2016.
2 Normative references
Add the following new references:
IEC 62923-1, Maritime navigation and radiocommunication equipment and systems – Bridge
alert management – Part 1: Operational and performance requirements, methods of testing
and required test results
IEC 62923-2, Maritime navigation and radiocommunication equipment and systems – Bridge
alert management – Part 2: Alert and cluster identifiers and other additional features
IMO Resolution MSC.302(87) (2010), Performance standards for bridge alert management

© IEC 2019
3 Performance requirements
3.4.2 General
(See 5.4.2)
Replace the second paragraph with the following:
(MSC.306(87) A1.3): Alternatively to the requirement in paragraph MSC.306(87) A1.2, the
equipment need not provide means to produce a printed copy of received information if it is
installed in combination with an interface connecting it to navigation equipment that is
compliant with resolution MSC 252(83), as amended, on Revised Performance standards for
integrated navigation systems (INS). Provisions for interconnection to a shipborne integrated
radiocommunication system (IRCS) when used in the GMDSS (resolution A.811(19)) shall
also be included.
If no means are provided by the equipment to produce a printed copy of received information
then the manufacturer’s documentation shall clearly describe that the equipment can only be
used when connected to an equipment enabled for the display of enhanced group calls in
compliance with the applicable IEC 61924-2 requirements.
NOTE The testing standard for compliance with INS (Resolution MSC 252(83)) is IEC 61924-2. The testing
standard for compliance with IRCS (Resolution A.811(19)) is IEC 62940.
(MSC.306(87) A1.4): The enhanced group call installation may be either separate or
combined with other installations. Elements of other installations, e.g. the antenna, low noise
amplifier and down converter of the ship earth system, may be shared for the reception of
enhanced group call messages.
4 Technical characteristics
4.4 Interfaces
Replace the existing text, modified by Amendment 1, with the following:
(See 5.8.3)
(MSC.306(87) A6.3): All interfaces provided for communication with other navigation or
communication equipment shall comply with IEC standards 61162.
(MSC.306(87) A6.1): The equipment shall include at least one interface for the transfer of
received data to other navigation display or integrated communications equipment.
The equipment shall be provided with a data interface capable of transmitting the sentences
SM1, SM2, SM3, SM4 and SMB according to IEC 61162-1.
(MSC.306(87) A6.2): The equipment shall include an interface for alert management in
accordance with resolution MSC.302(87) on Performance standards for bridge alert
management.
In addition to the sentences previously mentioned, the equipment shall be capable of
communicating with the sentences ACN, ALC, ALF, ARC and HBT according to IEC 61162-1.
The equipment shall be capable of classifying, handling, displaying and reporting alerts as
required in IEC 62923-1 and IEC 62923-2. In the BAM concept, the EGC receiver acts as an
alert source.
– 4 – IEC 61097-4:2012/AMD2:2019
© IEC 2019
The equipment shall be capable of releasing an alert with priority Warning and Category A
with alert identifier 3122 on receipt of a distress or urgency priority EGC message.
NOTE 1 Warning is a short audible announcement repeated up to every 5 min until acknowledged by the
operator, “Category A” refers to when acknowledgement is only possible at the source, “Alert identifier 3122”
indicates a message received warning.
The alert title for the first ALF sentence for a distress priority EGC message (C = 3) shall be
“Distress RX”. The additional information in the second ALF sentence shall be “Incoming
distress. Check Inmarsat display”.
The alert title for the first ALF sentence for an urgency priority EGC message (C = 2) shall be
“Urgency RX”. The additional information in the second ALF sentence shall be “Incoming
urgency warning. Check Inmarsat C display”.
NOTE 2 The priority codes (C ) are described in the IMO International SafetyNET Manual.
The alert, if not acknowledged, shall be repeated as a warning after a limited time period no
...